3TA400K - 400A, 3P K Frame Lug Kit

3TA400K -  400A, 3P K Frame Lug Kit

When you’re working with existing electrical equipment, the last thing you want is a terminal that doesn’t fit right or hold connections securely. The Eaton 3TA400K molded case circuit breaker terminal is built specifically for Series C J-K frame breakers, giving you a reliable solution for properly terminating line and load conductors in 400A applications.

This three-pole terminal kit is designed to handle demanding electrical loads while accommodating a wide conductor range—from (2) #3/0 AWG up to 250 kcmil copper or aluminum wiring per pole. The pressure-type design ensures a tight, consistent connection, which helps reduce the risk of loose terminations and keeps your system running as intended. Whether you're maintaining existing equipment or replacing worn components, the 3TA400K offers the right combination of fit, compatibility, and dependable performance for real-world applications. Simply put—it does the job it’s supposed to do, and it does it well.

Key Features and Benefits

• Made for Eaton Series C J-K frame molded case circuit breakers
• 400A rating supports higher-capacity electrical systems
• Three-pole configuration for multi-phase power distribution
• Accepts (2) #3/0 AWG to 250 kcmil copper or aluminum conductors
• Pressure-type terminals help ensure secure, stable connections
• Designed for straightforward installation and build to last.

Technical Specifications

• Manufacturer: Eaton
• Catalog Number: 3TA400K
• Product Type: Molded Case Circuit Breaker Accessory Terminal
• Amperage Rating: 400A
• Poles: 3
• Wire Range: (2) #3/0 AWG – 250 kcmil Cu/Al
• Terminal Type: Pressure-type (line and load)
• Frame Type: Series C, J-K Frame
• Dimensions: 6.4 in (L) x 4.7 in (H) x 4 in (W)
• Weight: 1.1 lb

Material Compliance and Certifications

• UL Listed for safety and compliance
• Meets applicable industry standards for molded case circuit breaker accessories
• Manufactured to Eaton’s established quality guidelines

Where It Works Best

• The Eaton 3TA400K is a practical choice for commercial and industrial electrical systems where Series C J-K frame breakers are already installed. It’s commonly used in panelboards, switchgear, and distribution equipment where proper conductor termination is critical. If you’re repairing, maintaining, or matching existing equipment, this terminal kit helps ensure everything lines up and functions the way it should.